JPH04284295A - Stapler device for form - Google Patents

Abstract

PURPOSE: To provide a device of a general form for rapidly replacing a staple head without any difficulty if a fault occurs. CONSTITUTION: The stapling device comprises a stapling head 1, and a driving element 2 for actuating the stapling head. The head 1 and the element 2 are connected by a releasable coupling slider 6. The head 1 and the element 2 are shiftably mounted on housing portions. The portions are connected with each other, and the head 1 is guided in grooves which are open toward the stapling position so that the head 1 can be removed from the portions when the element 2 has been disengaged.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a stapling apparatus for stapling stacks of sheets of paper, and more particularly, to a stapling apparatus comprising a drive element and a stapling head, the stapling head being operable by the drive element. The present invention relates to a stapling device which is movable into contact with an anvil and wherein the stapling head is adjustable to a plurality of selectable stapling positions.

0002

[Prior Art] Research Disclosure Publication (Res.
searchDisclosureBulletin
) Publication No. 15710 discloses a stapling device for a finishing unit of a copying machine, the stapling device being guided on a guide rod and adjustable to a plurality of selectable stapling positions. If the staple head does not function properly, for example due to jamming of a deformed staple, the staple device must be disassembled in a time-consuming procedure in order to be repaired outside of the unit.

To prevent jamming, it is known to design part of the staple head of a desktop stapling device as a pivotable element. However, in such devices it is generally not possible to determine the cause of the blockage. The reason is that the corresponding functional elements are hidden and cannot be seen from the outside. Therefore,
If the functional element is damaged, the jam will occur repeatedly and the damage cannot be removed, rendering the stapling device unusable.

[0004] In the case of both known stapling devices mentioned above, repeated jamming of the staple head results in long periods of downtime of the stapling device. Replacing or repairing a defective stapling device can be time consuming, especially if the stapling device is held in engagement with drive and guide means that allow adjustment to multiple staple positions. However, the stapling device cannot be used during this time.

[0005]

OBJECTS OF THE INVENTION It is an object of the invention to provide a device of a general type with which a staple head can be replaced quickly and without any difficulty in the event of a failure. That's true.

[0006]

SUMMARY OF THE INVENTION In accordance with the present invention, desirable results are achieved by connecting the staple head and drive element by a removable coupling. According to an advantageous refinement of the invention, the staple head and the drive element are movable on a common housing, and the staple head can be guided and removed in a guide groove opening towards the anvil. According to a preferred variant of the invention, the coupling is designed as a coupling slide that is guided by a spring load acting on the drive element and is held in positive engagement with the guiding member of the staple head. be done. According to a particularly advantageous modification of the invention, the stapling device is movably guided on a guide rod and can be adjusted to different stapling positions, and the drive element has a polygonal shape positively connected thereto. Engaged to the drive shaft. The staple head is housed in the form of a wire in an exchangeable magazine, and is used to transport, separate, and separate wire sections to be formed into staples.
It is advantageous to include all functional elements required for bending and driving.

By virtue of the design and provision of the staple head and drive element, the invention allows the staple head to be easily and quickly replaced in the event of a failure. Once a defective staple head has been removed, it can be observed from all directions outside the machine and replaced if necessary, and the staple machine can immediately continue operating with the newly replaced staple head. can.

The invention, its objects and advantages will become more apparent from the following detailed description of the preferred embodiments.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the invention will be better understood from the following description of embodiments of the invention illustrated in the drawings.

[0010] Referring to the drawings, the stapling device of the present invention is capable of stapling paper, particularly copy paper ejected by a copying machine;
are collected in a collecting station 9 and assembled into sets by staples, which are themselves well known and arranged in a finishing unit, not shown here. The stapling device is provided as a complete assembled unit in or on two cup-shaped plastic housing parts 13, 14, said housing parts being connected by a plurality of support legs 13c and 14b, respectively. , the support legs are screwed together and held in positive engagement. Only two support legs are labeled in the drawing.

[0011] The staple head 1 comprises a housing 1a in which a commercially available staple head of a type known per se with an exchangeable magazine 12 is provided. The head comprises all the functional elements required for transporting, separating, folding and driving the wire sections which are accommodated in the magazine 12 in the form of wire strips and are formed into the shape of staples. The actuating member 10 of the staple head 1 comprises a push bolt 11 which engages in the upper side 3e of the bracket 3 of the drive element, which is indicated in its entirety by the reference numeral 2. A U-shaped bracket 3 surrounds and positively engages a cam 4, which is rotatable on bearings 16 provided on both sides of the cam and positively connected to the cam. It is set in. The bracket 3 is formed with openings 3c, which are provided on both sides to receive the bearings 16 and allow the bracket 3 to move in the direction of arrow A. The bearings 16, which extend beyond the bracket 3 on both sides, are connected to the housing part 1, as can be seen in FIG.
3 and 14 so as to be rotatable. The bracket 3 is guided on the housing parts 13 and 14 by guide webs 3b and 3f, which guide webs are provided on both sides of the bracket and are guided in the direction of arrow "A" in correspondingly arranged guide grooves 13b. are advised to exercise. Only one of the guide grooves is illustrated.

A coupling slider 6 is movably mounted on the bracket 3 and positively engages the guide member 1d projecting from both sides of the actuating member 10 of the staple head 1. The coupling slider 6 is pressed against the illustrated connection position by springs 17, and these springs
It is supported on the wall portion 3a of the bracket 3, and can be moved in the direction of arrow "C" against a spring 17 when the handle 6a is operated. The sloped portion 6b of the coupling slider 6 allows the staple head 1 to be automatically locked upon insertion in a manner that will be explained further below. The staple head 1 is guided on the housing parts 13 and 14 by guide webs 1c, which are provided on arms 1b molded on both sides of the housing 1a and at the top thereof as shown in FIG. are engaged with the open guide grooves 13a and 14a.

The entire stapling device provided in the housing parts 13 and 14 is guided to move along a polygonal drive shaft 5 and a guide rod 15 and is adjustable into several selectable stapling positions. . The polygonal drive shaft 5 is rotated by a drive unit (not shown) and positively engages a correspondingly shaped bearing 16. The stapling device is permanently maintained in positive engagement with the polygonal drive shaft 5, so that it is ready for immediate operation in any stapling position.

A collection station 9 arranged above the stapling head 1 receives a stack 8 of sheets to be stapled. On the opposite side of the staple head 1 and above the stack 8 of sheets, an anvil plate 7 is provided which bends the ends of the staples protruding from the stack 8 of sheets 8 in a known manner to staple the staples. It plays the role of firmly stopping the A stationary anvil plate 7 comprising a plurality of anvils 18, known per se, provided at selectable stapling positions is provided in FIG.
and is fixed at the position shown in FIG. To enable replacement of the staple head 1, the anvil plate 7 can be removed from the movement path (not shown) of the staple head after removal of the attachment element.

The stapling device functions as follows.

In order to obtain a desired stapling position, the staple head 1 is moved along the guide rod 15 and the polygonal drive shaft 5 by a drive device or by manual operation and placed at the desired position (not shown). Fixed to. The stapling operation begins when the polygonal drive shaft 5 rotates clockwise, thereby rotating the cam 4 from its initial position shown in FIG. During this movement, the cam 4 moves the bracket 3
upward in the direction of arrow "A" (see Figure 1). At the same time, the actuating member 10 in contact with the upper part 3e of the bracket 3 moves upward in the direction of arrow "B". During this upward movement, the staple head 1 approaches the stack 8 of sheets to be stapled and the stack of sheets is placed on the anvil 18. Upon further movement of the actuating member 10, the wire section is separated from the wire strip in a known and not shown manner, then folded to form a staple and driven into the paper stack 8 from below. The ends of the staple projecting from the top of the paper stack 8 are folded over the anvil 18 in a known manner to securely secure the staple to the paper stack 8.

When the stapling operation is completed, the entire stapling apparatus 1, 2 is returned to the initial position shown in FIG. 1 by the cam 4 and the coupling slider 6, which further rotate clockwise. During this return movement, the wire strip advances in a known manner (not shown), thereby bringing the new staple wire portion into its operative position.

During the stapling operation, the staple head 1
If the mechanism becomes jammed, the drive operation is stopped, the anvil plate 7 is removed, and the coupling slider 6 is then moved in the direction of arrow "C" by the handle 6a. This releases the guide member 1d of the actuator 10. When the coupling slider 6 is removed, the staple head 1 is shown in the housing part 1 in a fully assembled unit.
3 and 14 from the open guide grooves 13a and 14a along the direction of arrow "B". In this state,
A new, properly functioning staple head 1 can be placed into the housing 13, 14 in a simple one-time operation by reversing the procedure described above. At this time, these guide members move the coupling slider via the inclined portion 6b and against the force of the spring 17 until the guide members are locked to the coupling slider 6 under the action of the spring force. 6 is pushed sideways. Once the anvil plate 7 is reattached, the stapling device is immediately ready for use.

Although the invention has been described with particular reference to preferred embodiments, it will be understood that various modifications and changes may be made within the principle and scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the device of the present invention in its initial position, with the housing omitted.

2 is a perspective view showing the device of the invention together with a housing and guide means on a slightly smaller scale than in FIG. 1; FIG.

[Explanation of symbols] 1 Staple head
2 Drive element 3 U-shaped bracket
4 Cam 5 Drive shaft
6 connection means 13,
14 Housing 15
Guide rod 18 Anvil

Claims (6)

[Claims] 1. A stapling device for connecting stacks of sheets by stapling, comprising: a drive element; a staple head actuated by the drive element and movable to contact an anvil; Stapling device, characterized in that the head is adjustable into a plurality of selectable stapling positions, and that said stapling head (1) and said drive element (2) are connected by removable connection means (6). 2. The stapling device according to claim 1, comprising:
The stapling head (1) and the drive element (2) are guided for movement in the stapling direction on a common housing (13, 14), and the stapling head (1)
) is driven by said drive element (
2) A stapling device characterized in that it is actively connected to. 3. The stapling device according to claim 2, comprising:
the connecting means comprises a coupling slider (6);
The coupling slider is spring-loaded and guided to move on the drive element (2) and is engaged with at least one guide member (1d) of the staple head (1). A stapling device characterized in that it is held in a stapling device. 4. The stapling device according to claim 2, comprising:
A guide web (1c) is arranged on the staple head (1), said guide web extending parallel to the stapling direction, provided on the housing (13, 14) and on the anvil (18). A stapling device characterized in that it actively engages with guide grooves (13a, 14a) that open toward the direction. 5. The stapling device according to claim 2, comprising:
The drive element (2, 4, 16) has a polygonal drive shaft (5
), said housing (13, 14) being movably guided along a guide rod (15). 6. The stapling device according to claim 5, comprising:
Said drive element (2) comprises a cam (4) positively and movably connected to said polygonal drive shaft (5), said cam being movably guided on said housing (13, 14). A stapling device characterized in that it positively engages with a U-shaped bracket (3).